On Korn’s constant for thin cylindrical domains
On Korn’s constant for thin cylindrical domains
复制标题
关于薄圆柱域的科恩常数
DOI:
10.1177/1081286512465080
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发表时间:
2014
影响因子:
2.6
通讯作者:
G. Tomassetti
中科院分区:
文献类型:
--
作者:
R. Paroni;G. Tomassetti
We consider an ε-parametrized collection of cylinders of cross section εω, where ω ⊂ ℝ 2 , and of fixed length ℓ. By Korn’s inequality, there exists a positive constant Kε such that ∫ Ω ε | sym ∇ u | 2 d 3 x ≥ K ε ∫ Ω ε | ∇ u | 2 d 3 x provided that u ∈ H 1 ( Ω ; ℝ 3 ) satisfies a condition that rules out infinitesimal rotations. We show that Kε∕ε2 converges to a strictly positive limit, and we characterize this limit in terms of certain parameters that depend on the geometry of ω and on ℓ.